javascript 请解释这四项承诺之间的区别：[非公开会议]

lkaoscv7 于 2022-12-25 发布在 Java

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A) foo().then(() => bar());

B) foo().then(() => {
     bar();
   });

C) foo().then(bar());
D) foo().then(bar);

'
我需要了解其中的区别。请告诉我

JavaScript

来源：https://stackoverflow.com/questions/74902294/please-explain-the-difference-between-these-four-promises

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按热度按时间

zwghvu4y1#

A) foo().then(() => bar());
() => bar() -> this is a function taking no arguments running bar and returning whatever bar returns
B) foo().then(() => { bar() });
() => { bar() } -> this is a function taking no arguments running bar and returning nothing
C) foo().then(bar());
bar() -> this is whatever bar returns
D) foo().then(bar);
bar -> this is a pointer/reference to the bar function effectively it will run bar with whatever foo() returens as bar's arguments

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javascript 请解释这四项承诺之间的区别：[非公开会议]

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